Hose coupling



May 31, 1927. 1,630,895

w. K. HERBST y HOSE coUPLING Filed Aliei. 30, 1922 TEE-.4.

'lll IIA j INVENTOR AZ, ATTORNEY APatented May 31, 1921.

UNITED STA TEs PATENT OFFICE.

WILLIAM y IK. HERBST, OF HILLSIDE, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO TITEFLEX METAL HOSE CO., AA CORPORATION 0F NEW JERSEY.

HOSE CO'UPIING..

`Applicatioi filed August 80, 1922. Serial No. 585,125.

The present invention relates to flexible tubes and the manner of attachment 'to couplings. Y I

One object of this invention is to provide a coupling to which a flexible tube may be securely attached. i

A further object is to provide a means whereby the exterior armor ofithe flexible tube may be secured to a coupling.

which will insure tightness and withstand strains.

Further and ancillary objects will appear upon inspection of the annexed specilication and appended claims.

In' the drawings, 'which illustrate this invention- Figure l is a side view of a coupling and tube lpartly lin section and partly in elevation;

Fig. 2 is a View similar to Figure 1 showing a different manner of securing the tube y to the coupling;

Fig. 3 is a side view partly in elevation and partly in section of a modified coupling and another form ,ofy tube;

Fig. et v:is a side View in elevation of a coupling and tube showing a ydilferent manner of securing the tube to the coupling; and

Fig. 5 is a side View partly insectionand partly in elevation of a modified coupling with a tube secured thereto.

Referring to the .drawings the coupling 1 is provided with a threaded nipple 2 wheref by the flexible hose secured to the coupling may be secured to any desired orifice or other pipe. The coupling also comprises a flange -or enlargement 3 of octagon periphery tto provide for engagement of Va wrench to turn the coupling Iin the usual manner to engage it or disengage it. The coupling is further' provided with a flange or shoulder 4, a depressed space or groove being formed be.

tween the Wrench hold 3 and the shoulder 4. On the opposite side of the flange 4 from thegroove is a corrugated nipple or extension 5 adapted toreceive and hold a rubber tube in the usual manner of employing such nipples. It is to be observed that, referring particularly to Fig. l, the nipple is so located that 'the shoulder 6 is provided upon the coupling cured to the coupling. A further object to provide a meansI of attaching a flexible tube to a coupling' upon the interior of the nipple 5 and also a shoulder 7 is formed on the coupling outside the nipple.

The construction referred to insures a permanent connection between the hose and coupling under all pressures and alsov is strengthened against mechanical strains by the metallic braid which is permanently seespecially advantageous at high pressures because, after the pressure is put on thehose,

and held in position by the metallic braided The structure is covering that this disadvantage in the use of l' rubber hose is avoided. In some extreme instances a clamp might be placed about the hose outside the braided covering and about the nipple on which the rubber tube is placed, so that th'etendency of the braided covering to reinforce the rubber against blowing outwardly is vfurther reinforced.

.'lhis, however, is only necessary in extremeV instances where, for instance, with tubes of extremely small diameters the internal pressure miglit'exert a greater pressure toward bursting than is compensated for by the end thi-.ust causing the braid to tighten' down.. .The application of the ordinary'hose clamp, as referred to, will insure a permanent tight connection at the coupling under these extreme circumstances. In the structure shown in Fig. l, the hose to be secured to the coupling comprises a corrugated flexible metal-tube 'i' which may be of the structure as shown in the 'patent to Louis H. Brinkman, No. 1,198,392, September 12, 191.6, a rubber tube 8 surrounding the flexible metal tube and outside ot the rubber tube is a braided structure comprised of strands of metal Wire, some strands as 8 being wound inv one direction, while other of such depthfas to accommodate a metal tube having an internal bore substantially that of the bore ofthe coupling. The metal tube may then beesecured to the coupling by soldering. The rubber tube is stretched over the mpple 5 and comes against the shoulder 7. It Will be seen that the depth of the face 7 is substantially that of the rubber tube so Ithat the vrubber is substantially flush with the periphery ofthe slioulder 4. The outer braided wire covering is carried over the flange 4 into the recess between it and the enlargement '3 and is firmly secured to the coupling therein by tightly wrapped wire 10 as shown and this may be augmented by soldering if desired.

' The structure of Fig. 2 is the same as that of Fig. 1 except that solder 11 is relied on to secure the braided covering to the couplin y Also as shown iii Fig. 4 the braided coverving might be secured to the coupling by an open ring clamp 12 (an ordinary hose clamp) adapted to be set down tightly upon the coverinoand secure it to the coupling by means oi? .ends of the ring together.

In the structure shown in Fig. 3, therubber tube is not present, the hose comprising the corrugated flexible metal tube 7 with the braided covering comprising the strands 8 and 9 thereon. f' The cbuplingis'modified accordingly in that there is no recess formed yfor the rubber tube, there being simply an internal recess for the metal tube v7, the braided covering passing over the outside of the extension and over'thel shoulder 4,l

being secured to the coupling by wire wrappinglO as in the case of Fig. 1. n

In the structure shown in Fig. 5 the inner metal'tube is not present, the hose consisting Qf'.- a rubber tube 8 and the outer covering comprising the lbra'ided 'strands 8 and 9. In this case vthe inner metal tube not being present, the interior recess and shoulder for receiving it are not present lwhile the rubber tube 8 is stretched over the nipple 5 and the/outerbraided covering passes over. the shoulder 4 and is secured in the groove between the enlargement 3`andthe shoulder l4 yin a manner as'described in connection with.` Fig. 1...

'While the invention has been illustrated in what is considered its best application it may have other embodiments without departing from its spirit and isA not limited to the structures shown in the drawings. I

What I clainiis: j

1. The combination of a coupling proa screw 13 adapted to draw the vided with an extensionya shoulder between said extension and the rest of said coupling a` flexible tube secured to said coupling and abuttingsaid shoulder at one side thereof and means for securing said tube to said coupling .-on the other side of said shoulder, said means comprising wire braid, said means and the.r abutting Mend of said flexible tube being spaced l apart longitudinally of the tube. v

2. The combination with a coupling, of atube comprising a corrugated-inner tube, .a rubber -tube thereabout and a helically stranded covering. over said rubber tube,

said coupling having a portionsurrounded tby `said rubbertube, said helically stranded covering being secured to said coupling and adapted tobear against said rubber to presls it against said coupling portion on stress longitudinally of the tube and said corrugated tube having an -abutment against said coupling.

3. The combination with a coupling having an exterior shoulder and an interior shoulder with an extensionpextending from said shoulders, of'a flexible tube comprising a corrugated inner tube, Ia rubber covering surrounding the same and a helically stranded covering surrounding said rubber tube,

saidjcorrugated tube entering within. said extension, said rubber tube extending about the outside of said extension and said strandmiv ed covering.v extending vover the exterior shoulder on said coupling and being secured to said coupling.

4. The combination with a coupling having an exterior radial projection, of a rub,- ber tube having one Nend upon one side of said projection and a helically stranded metal covering about said rubber tube extending beyond the end thereof and bent rdownwardly about said. projection into a recess upc `the other sideof said projection from the vnd of said rubber tube, said covering being secured to said coupling in said recess.l

5. The combination with a coupling having an exterior radial projection, of a rubber tube having one end upon one side of said projection and a helically stranded "metal covering about said rubber tube extending beyond the end thereof and bent downwardly about said projection into a recess upon the other side of said projection from the end of said rubber tube, said covering being vsecured to said coupling in said recess, said coupling having an extension entering within the end of said rubber tube.`

16. The combination with a coupling havfing. an exterior radial projection, of a rubber tube having one end upon one side of said projection and a helically stranded metal covering'about said rubber tube extending beyond the end thereof and bent,l

downwardly about said projection into a recess uplon the. other sideof said projection"- from t ing being secured to said coup recess and a fiexible nieta-1 tube rubber tube.

e end of said rubber tube said cover# fing in said inside' said 7. The combination with al coupling-having an exterior radial projection, of a rubber-v of, said rubber tube [said covering curedfto said coupiing in said recess, said 'e other side of'saidi prdjeetion from'theiend V ing se-- cou ling havingjanextension entering within t e endofsai'd yrubber tube,l and an. interior shoulderl and 4a iexible metal tube extending inside saidextension and havin its 'end -Iine Withthc'said' interior shou der.

In testimonyrwliereofl have signed this specification V1922.V ,--WILLiMKfHE-BST.- 

